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// -*- C++ -*-
//
// Package: CondCore/CondHDF5ESSource
// Class : Group
//
// Implementation:
// [Notes on implementation]
//
// Original Author: Christopher Jones
// Created: Fri, 30 Jun 2023 15:26:23 GMT
//
// system include files
#include <cassert>
// user include files
#include "h5_Group.h"
#include "h5_DataSet.h"
#include "h5_Attribute.h"
#include "FWCore/Utilities/interface/Exception.h"
namespace cms::h5 {
//
// constants, enums and typedefs
//
//
// static data member definitions
//
//
// constructors and destructor
//
Group::Group(hid_t iParentID, std::string const& iName) : id_(H5Gopen2(iParentID, iName.c_str(), H5P_DEFAULT)) {
if (id_ < 0) {
throw cms::Exception("UnknownH5Group") << "unable to find group " << iName;
}
}
Group::Group(hid_t iParentID, const void* iRef) : id_(H5Rdereference2(iParentID, H5P_DEFAULT, H5R_OBJECT, iRef)) {
if (id_ < 0) {
throw cms::Exception("BadH5GroupRef") << "unable to dereference Group from parent " << iParentID;
}
}
// Group::Group(const Group& rhs)
// {
// // do actual copying here;
// }
Group::~Group() { H5Gclose(id_); }
//
// assignment operators
//
// const Group& Group::operator=(const Group& rhs)
// {
// //An exception safe implementation is
// Group temp(rhs);
// swap(rhs);
//
// return *this;
// }
//
// member functions
//
//
// const member functions
//
std::shared_ptr<Group> Group::findGroup(std::string const& iName) const {
return std::make_shared<Group>(id_, iName);
}
std::shared_ptr<DataSet> Group::findDataSet(std::string const& iName) const {
return std::make_shared<DataSet>(id_, iName);
}
std::shared_ptr<Attribute> Group::findAttribute(std::string const& iName) const {
return std::make_shared<Attribute>(id_, iName);
}
std::shared_ptr<Group> Group::derefGroup(hobj_ref_t iRef) const { return std::make_shared<Group>(id_, &iRef); }
std::shared_ptr<DataSet> Group::derefDataSet(hobj_ref_t iRef) const { return std::make_shared<DataSet>(id_, &iRef); }
std::string Group::name() const {
ssize_t name_size = H5Iget_name(id_, nullptr, 0);
size_t actual_name_size = static_cast<size_t>(name_size) + 1;
std::unique_ptr<char[]> buffer(new char[actual_name_size]);
H5Iget_name(id_, buffer.get(), actual_name_size);
return std::string(buffer.get());
}
std::size_t Group::getNumObjs() const {
H5G_info_t ginfo; // Group information
herr_t ret_value = H5Gget_info(id_, &ginfo);
assert(ret_value >= 0);
return (ginfo.nlinks);
}
std::string Group::getObjnameByIdx(std::size_t idx) const {
// call H5Lget_name_by_idx with name as NULL to get its length
ssize_t name_len = H5Lget_name_by_idx(id_, ".", H5_INDEX_NAME, H5_ITER_INC, idx, nullptr, 0, H5P_DEFAULT);
assert(name_len >= 0);
// The actual size is the cast value + 1 for the terminal ASCII NUL
// (unfortunate in/out type sign mismatch)
size_t actual_name_len = static_cast<size_t>(name_len) + 1;
std::unique_ptr<char[]> buffer(new char[actual_name_len]);
(void)H5Lget_name_by_idx(id_, ".", H5_INDEX_NAME, H5_ITER_INC, idx, buffer.get(), actual_name_len, H5P_DEFAULT);
return std::string(buffer.get());
}
//
// static member functions
//
} // namespace cms::h5
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